Automatic drift for boring mill spindles



Sept. 2, 1952 G. E. MORSE ETAL 2,608,886

AUTOMATIC DRIFT FOR BORINGMILL SPINDLES 7 Filed May 28, 1951' 2 SI-IEETS -SI-IEET 1 Fig.

&\\\\\\\\ 49g 1 62/ 70 a a 4 2a 5o 45 48% g; George E. Morse James K. A/lbr/ghf INVENTORS.

Sep 1952 e. E. MORSE ETAL AUTOMATIC DRIFT FOR BORING MILL SEINDLES 2' SHEETS-SHEET 2 Filed May 28, 1951 you 5 M a w m. Z mm .K m m m M G w B m wf W ma Q t m Patented Sept. 2, 1952 rime}? AUTOMATIC DRIFT FOR BORING MILL SPINDLES GeorgeE. Morse, Vandalia, and James K, Allbright, Dayton, Ohio Application May 28, 1951, Serial No. 228,612

7 Claims. (CL. ii-55.)

The. present invention relates to an automatic drift attachment; for boring. mill spindles whereby: the tool carried by a spindle can be automatically ejected therefrom. when. it is desired to change. tools.

An object of the. present: invention is to provide an attachment. which. can be readily aflixed to the front plate of a spindle assembly on a boring' mill or: the like, the attachment providing meansfor supporting a. tool andincluding means for automaticallyejecting the tool when the op.-

eration employing the tool has been completed. Another object ofthe present invention is to provide an attachment including at least one. drift element which is transversely slidable rela-. tive tothe sleeve holding the tool, inward movement of the spindle actuating transverse travel of the drift and contact between the drift: and inner end of the tool effecting outward ejection, of the tool.

A'stillfurther object of the present invention isto provide means. for resiliently maintaining the drift element of the attachment in a preselected first and inoperative position until such time as the spindle is moved inwardly for effect-- ing ejection of'the tool carried by the sleeve of the attachment. 1

'Anotherobjectof the present invention is to provide one or more drift elements carried by the sleeve of the attachment for transverse move ment relative thereto, each of the drift elements having a face of preselected configuration whereby: the same can'engage the inner end of the tool; for outwardly ejectingthe same.

Various other objects and advantages will become apparent from the detailed description to follow; The best forms in which I- have contemplated applying my invention are clearly illustrated in the accompanying drawings, where m:

Figure 1 is. a side elevational view of a con-. ventional boring mill with the automatic drift attachmentsecured thereto;

Figure 2 is a vertical longitudinal sectional view on an enlarged scale through a first form of automatic drift attachment; Y

Figure-3 is a top plan view of a portion of the sleeve of the automatic drift attachment of Fin ure 2;

Figure 4 is an end elevational view of the attachment. of Figure 2" as seen from the'left of that fi ure:-

.Ei m'e. is a. vertical longitudinal sectional View. of; a. modified. form-of automatic drift at-v tachment mounted on the. spindle assembl of awnin -111111;. 1' i Figure 6 is avertical transverse sectional view. taken substantially along the plane of line 6 6 of- Figure 5.;

Figure 7 is a detail perspective view ofthe pair of? drift sections which constitute a pair of the elements of the modified form. of attachment shown in Figure 5; and I Figure 8 is.- a detail perspective view-of the plunger employed in the attachment of Figure 5.

Referring more particularly to the drawings, wherein lik numerals designate like, parts throughout, the numeral 10 designates; general 1y a conventional boring mill such as; the; 30. Series Table, Type manufacturedb-y'the Giddings and Lewis Machine Tool Company-.. The numeral 12- designates-v generallythe first form of, attachment for the boring mill [0: while the numeral 14 designates. the modified form ofjbor-v ing mill attachment.

Looking now at Figures 1 through 4, the. first form. ofboring: mill attachment, I2 will presently be described. Inasmuch as the boring: mill it is. of conventional form and of the type manufactured by the Giddings and Lewis Machine'lool Company, a detailed description thereof is deemed unnecessary; Suflice it; to say, the boring mill i0 is provided with a secondary shaft [6 havinga bevel gear l8 secured at one end for engagement with the bevel gear 20 carried by the shaft22. The shaft. 22; has a pinion 24, secured thereto for engagement with the rack 26. secured tothe-main spindle 23. of the boring mill. The secondary shaft It can be selectively actuated byme'ans of the hand lever provided on boring mills of the. present type whereby the spindle 28 can be longitudinally moved when so desired. The purpose of the longitudinal movement; of the spindle 28. will be more. fully understood hereinafter. The mechanism 30 within the casing or'housing 31. of the boring mill is similarly conventional and'is employed for selectively actuating or simul-'- taneously actuating the. spindle 28 and'secondary shaft l6 depending upon the function to be ef fected.

Figure, 2- shows the details of the spindle as sembly; tov which the attachment of the present. invention isto be; secured. A spindle assembly llincludes a ball bearing: 32 which is receivedwithin the recess 34: of the housing 3! of the boring mill. The flange 36 retains theball bearing within the recess. The front plate it is rctatably supported in the ball bearing 32 and is formed with a centrally disposed bore 40'. The spindle 2811s alsoof completely conventional form having the tapered bore 42 which is convention'- ally. adaptedv to. receive'the tapered shank one tool. The spindle 23 has a transversely disposed bore 44 which is in communication with the tapered bore 42.

The automatic drift attachment I2 includes a striker plate 46 which is of disk-like form recessed on one face at 48 for engagement over the front face of the front plate 38. The striker plate 46 is formed with a plurality of bores 50 and counterbores 52 in which a plurality of bolts 5-4 can be disposed. The striker plate 46 is secured to the front plate 38 by means of the :bolts 54 which are engaged in the threaded recesses 53 formed in the front plate 38.

The striker plate 46 is formed with a centrally disposed opening 58 and a tapered slot wit in open communication with the opening 58.

A sleeve 62 having a tapered portion 64 is removably disposed within the tapered bore 42 of the spindle 28 in the same manner that a tool would have been removably disposed in the bore 42. The sleeve 62 is formed with a tapered bore at 66 which is similar to the bore 42 for receiving the tapered shanks of various tools. The sleeve 62 is also formed with a transversely disposed bore 68' which is of substantially rectangular form, as seen best in Figure 3, with a guide groove I in open communication with the rectangular bore 68.

The desired tool I2 is removably disposed in the tapered bore 66 in a conventional manner with the inner end of the tool extending into the transverse slot and bore I0 and 8.

The drift element I4 is of substantially rectangular form, having a key I6 integrally formed therewith. The drift element 14 is slidably engaged in the transverse bore 68 with the key 16 slidably engaged in the keyway or slot iii. The drift element 14 is formed with a beveled or inclined surface I8 which is adapted to engage the inner end of the shank of the tool i2 while the upper end of the drift element I4 is formed with an inclined surface 88 which is adapted to be in engagement with the tapered slot 60 of the striker plate 46.

The drift element I4 is also formed with a recess at 82 defined by the horizontally disposed wall 84 and the cam surface 86.

The sleeve 62 is formed with a bore 88 which is coaxial with the tapered bore 66 and in open communication with the transverse boreBB. A pin 90 having a rounded head 92 is slidably disposed in the bore 88 with its rounded end engageable in the recess 32 of the drift element I4. A coil spring 94 is disposed within the bore 88 and outwardly urges the pin or plunger 90 for engagement with the drift element M.

In view of the foregoing description of the first form of automatic drift attachment for boring mills and the like, it is believed that the structure and operation of the attachment will be readily understood by one skilled in the art. When an operation employing the tool 12 has been completed and it is desired to employ a second tool, one of the operating levers of the boring mill I0 is actuated for effecting rotation of the secondary shaft I6 whereby the pinion 24 will be rotated. As a result thereof, the rack 26 and spindle 28 secured thereto will be longitudinall moved, thereby inwardly drawing the sleeve 62. The engagement between the drift element I4 and tapered slot 60 will effect radial inward movement of the drift element 14 in opposition to the spring urged plunger 30. The beveled face I8 of the drift element 14 will engage the inner end of the tool I2 for effecting ejection of the same.

Upon ejection of the tool, the spindle can again be outwardly moved whereby the drift element I4 will assume its first position as a result of the cam action between the plunger head 92 and the cam surface 86. At that time, another tool can be inserted in the tapered bore 66 for the next operation.

Looking now at Figures 5 through 8, the structure of the modified form of automatic drift attachment I4 will be presently described. The structure of the boring mill and spindle assembly of course remains the same as in Figures 1 through 4. However, the striker plate 94 which is secured to the front plat 38 by means of the bolts 54 differs from the striker plate 46 in that the pair of tapered slots 36 and 88 are formed at opposing sides of the opening 5-3 of the striker plate 34.

The sleeve I08 differs from the sleeve 62 in that the transverse bore I02 is of elongated rectangular form. Also, the sleeve I00 is formed with a bore I06 coaxial with the tapered bore I 08 which receives the tool 73, the bore I64 opening into an enlarged bore I08 which is in open communication with the transverse bore I02.

Transversely disposed within the sleeve I00 andin the transverse bore I02 are a pair of drift sections H0 and H2. Figures 6 and 7 show the details of the drift sections H0 and H2. The drift section I I 0 is of substantiallyrectangular cross section in a horizontal plane and has a downwardly extending portion I I4 formed with a groove II6 disposed'in a vertical plane. Theupper end of the drift section H0 has a beveled surface at IIB which is adapted to be engaged in the tapered slot 36. The downwardly extending portion I I4 of the drift section I I0 has a forward inclined surface I20 and a V-shaped groove I22 in its rear face.

The drift section H2 is of substantially rectangular cross section in a horizontal plane and has its lower surface beveled at I24 for engagement in the tapered slot 98 of the striker plate 94. The drift section I I 2 is formed with a tongue I26 which is integrally secured thereto-andzuD- standing for engagement in the groove H6 of the drift section H0. The forward face of the tongue I26 is beveled at I28 while the rear face is formed with a V-shaped groove I30.

The pair of drift sections H0 and H2 are disposed with the tongue I26 engaged in the groove I I6 and the pair of sections disposed in the trans-' verse bore I02 as shown in Figure 5. The pair of drift sections are maintained in a first relation by the engagement of the plunger head I32.

The details of the plunger are best shown in Figure 8. The plunger head I32 is formed with a V-shaped face I34 which engages the V-shaped grooves I22 and I30 of the drift sections. The plunger head I32 has a reduced diameter portion I36 which is slidably engaged in the bore I04 of the sleeve I08. Both the head I32 and reduced diameter extension I36 are provided with grooves I 38 and I40 whereby the air trapped in the bores I08 and I04 will be in open communication with the atmosphere. A coil spring I42 is disposed in the bore I08 for outwardly urging the plunger head I32.

In view of the description of the modified attachment, it is believed that the operation thereof will be obvious to one skilled in the art. The tool 13 is employed for performing the desired function. When the operation has been completed, the lever of the boring mill I0 is thrown for actuating the secondary shaft. I6 whereby grsoves) lzzj nevsa f -Having described the 1' as new isf' Anautoinatic drift invention; w t is attachment 'for boring mi l? spindles i-i'rclii'din'gf a serene havinga I bearing rotatably; supporting the front plate, thespind'le-being the-front plate and having atapered bore adapted j removably s reive the taperedshank of a tool therein; said attachment comprising a striker plate having-an enlarged j jopeningn at; the'icenter thereof and adapted tobe detachably'connected to the front plate, a sleeve having atapered end positionable in the taperedbore'of' thespindle, said sleeve being formed with a tapered bore for removably receiving the tapered shank of a tool, said sleeve having a transverse bore in communication with its tapered bore, said striker plate having a longitudinal, tapering slot formed in communication with the central opening thereof, and means slidably engaged in said transverse bore and tapered slot of the striker plate and engageable with the inner end of the tool, inward movement of the spindle and sleeve carried thereby effecting transverse movement of said means for disengaging the tool from the sleeve.

2. An automatic drift attachment for boring mill spindles including a spindle housing having a bearing rotatably supporting the front plate, the spindle being carried by the front plate and having a tapered bore adapted to removably receive the tapered shank of a tool therein, said attachment comprising a striker plate having an enlarged opening at the center thereof and adapted to be detachably connected to the front plate, a sleeve having a, tapered end positionable in the tapered bore of the spindle, said sleeve being formed with a tapered bore for removably receiving the tapered shank of a tool, said sleeve having a transverse bore in communication with its tapered bore, said striker plate havin a longitudinal tapering slot formed in communication with the central opening thereof, and means slidably engaged in said transverse bore and tapered slot of said striker plate and engageable with the inner end of the tool, inward movement of the spindle and sleeve carried thereby eifecting transverse movement of said means for disengaging the tool from the sleeve, and resilient means engaging said first recited means and urging the same to a first position.

3. An automatic drift attachment for boring mill spindles including a spindle housing having a bearing rotatably supporting the front plate, the spindle being carried by the front plate and having a tapered bore adapted to removably receive the tapered shank of a tool therein, said attachment comprising a striker plate having an enlarged opening at the center thereof and adapted to be detachably connected to the front plate, a sleeve having a tapered end positionable in the tapered bore of the spindle, said sleeve being formed with a tapered bore for removably receiving the tapered shank of a tool, said. sleeve 6 having ai trans verse bore in commumeatiomwithi its taperedi: bore, "saidfistrikerplate; having" To g tudinali' tapering: Isloiz; formed? in;v communi-s cation wi'th the'bentral: opening: thelteoiqamt means slidably: engage'din said transverse bore aind 'taperedslotofthe. striker plate and? engage-- able with the inner end loft the tool, inwardrmovei mnf of the spindle and sleeve carried. thereby;- effecting transverse-movement of 'saidimeans; for disengaging thert'ool from the sleeve, saidymeans including a; drift, the .u-pper end of said. dritt having an inclined surfacerengaageable ion-ode operation: with the tapered: slot; in said. striker plate, said drift having-, aminclisned -surfiafifi for. engagement with; the-inner end: of'the tooLw-herebytransve'rse movement ofrthe drift efiiects longirs tudinal movementxofthetool; 1 j 4; An':' automatic. drift. attachment in: boxing mill spindles including al'spindle. housing havin a bearing rotatably supporting the front;- plate, the spindl'e'being; carried bythe front; plata anct having a ta-pere'd bore-adapted to, removably: re ceive-v the tapered shank? of" a: tool therein, .saici attachment: comprising a striker. platehaving: an:

enlarged openingat the. center thereof and,

adapted to be detachably connected to the front plate, a sleeve having a tapered end positionable in the tapered bore of the spindle, said sleeve being formed with a tapered bore for removably receiving the tapered shank of a tool, said sleeve having a transverse bore in communication with its tapered bore, said striker plate having a longitudinal tapering slot formed in communication with the central opening thereof, and means slidably engaged in said transverse bore and tapered slot of said striker plate and engageable with the inner end of the tool, inward movement of the spindle and sleeve carried thereby effecting transverse movement of said means for disengaging the tool from the sleeve, and resilient means engaging said first recited means and urging the same to a first position.

5. An automatic drift attachment for boring mill spindles including a spindle housing having a bearing rotatably supporting the front plate, the spindle being carried by the front plate and having a tapered bore adapted to removably receive the tapered shank of a tool therein, said attachment comprising a striker plate having an enlarged opening at the center thereof and adapted to be detachably connected to the front plate, a sleeve having a tapered end positionable in the tapered bore of the spindle, said sleeve being formed with a tapered bore for removably receiving the tapered shank of a tool, said sleeve having a transverse bore in communication with its tapered bore, said striker plate having at least one tapered slot formed in communication with the central opening thereof, and means slidably engaged in said transverse bore and in each tapered slot of said striker plate and engageable with the inner end of the tool, inward movement of the spindle and sleeve carried thereby effecting transverse movement of said means for disengaging the tool from said sleeve.

6. An automatic drift attachment for boring mill spindles including a spindle housing having a bearing rotatably supporting the front plate, the spindle being carried by the front plate and having a tapered bore adapted to removably receive the taperedshank of a tool therein, said attachment comprising a striker plate having an enlarged opening at the center thereof and adapted to be detachably connected to the front plate, a sleeve having a tapered end positionable 7 r in? the tapered bore of the spindle, said sleev being formed with a tapered bore for removably receiving the tapered shank of a tool, said sleeve having a transverse bore in communication with its tapered bore, said striker plate having a pair of tapered slots formed in communication with the central opening thereof and in opposing relation to each other, and sectional means slidably engaged in said transverse bore and said pair of slots and engageable with the inner end of said tool, inward movement of the spindle and sleeve carried thereby effecting inward transverse movement of said sectional means for disengaging the tool from the sleeve.

7. An'automatic drift attachment for boring mill spindles including a spindle housing having a bearing rotatably supporting the front plate, the spindle being carried by the front plate and having a tapered bore adapted to removably receive the'tapered shank of a tool therein, said attachment comprising a striker plate having an enlarged opening at the center thereof and adapted to be detachably connected to the front plate, a sleeve having a tapered end positionable in the tapered bore of the spindle, said sleeve beingformed with a tapered bore for removabiy receiving the tapered shank of a too], said sleeve having a transverse bore in communication with its tapered bore, said striker-plate having a pair of tapered slots formed in communication with the central opening thereof and in opposing relation to each other, and sectional means slidably engaged in said transverse bore and said pair of slots and engageable with the inner end of said tool, inward movement of the spindle and sleeve carried thereby effecting inward transverse movement of said sectional means for disengaging thetool from the sleeve, said sectional means including a pair of drift sections, one of said sections having a groove formed therein, the other of said sections having a tongue slidably engageable in the groove, each of said sections having a beveled outer end engageable in said tapered slots, and resilient means normally maintaining said sections in predetermined relation to each other.

GEORGE E. MORSE.

JAMES K. ALLBRIGHT.

No references cited. 

